Electric heater



Patented Mar. 28, I899.

J. D. 8. REED.

ELECTRIC HEATER.

(Application filed In. 275, 1898.)

(No Modal.)

UNITED STATES PATENT OFFICE.

JAMES D. S. REED, OF CHICAGO, ILLINOIS.

ELECTRIC HEATER.

SPECIFICATION forming part of Letters Patent N 0. 622,166, dated March 28, 1899.

Application filed March 25, 1898- Serial No. 675,090. (No modeL) To all whom it may concern:

Be it known that I, JAMES D. S. REED, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Electric Heating Apparatus; and I do hereby declare that the followin g is a full, clear, and exact description thereof, reference being had to the accompanying drawings, andto the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in electrical heating apparatus; and the object of the invention is to produce a cheap and simple construction in devices of this character designed to be used for heating apartments, street or railway cars, and other like places where a heating-stove is required.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of an apparatus embodying my invention. Fig. 2 is a longitudinal section thereof. Fig. 3 is a top plan View of the same. Fig. 4- is a side elevation of the inner core, showing a part of the wiring thereon.

As shown in said drawings, A designates the outer casing of the apparatus, which may consist of any suitable radiating materialsuch as iron, glass, porcelain, or the likewhich is supported upon suitable legs or stand ards A. Said casing is provided at its upper end with a removable cover A by means of which the active parts of the apparatus may be inserted therein. In order to provide a greater surface for radiation, the outer surface of said casing is corrugated. Said casing is herein shown as cylindrical in form, but obviously may be made of any cross-sectional form found convenient or desirable.

B designates a core located Within the in-v upper end thereof. Within this groove is located a continuous conducting-wire O. Said core will be made of any suitable insulating material and will preferably be made of a material which is a good conductor of heat as well, such as porcelain or like composition. The groove 5 within the outer face of the core will be of such depth as to hold the wire permanently in place in the core and to insulate the several turns of wire from each other.

C designates a lead-wire which leads from any suitable source of current-supply. The return or ground Wire 0 leads from the upper end of the core back to the lower end thereof and, as herein shown, extends through an opening in the upper wall of the hollow core and downwardly through the hollow interior thereof. With this construction'when the winding 0 is thrown into the circuit of a current having a relatively high potential the resistance of the winding to said current will cause the same to become heated in a well= known manner, thereby heating by conduction the exterior of the casing A, as Well as the enveloped core B. The entire length of the winding will be raised to the same temperature, and the apparatus will give out heat to its greatest capacity.

A designates an insulating-lining upon the the inner surface of the casing A and between the same and the winding 0.

D D designate a switch which is connected with the return-wire and which is adapted to cut a portion of the resistance coilout of cir' cuit when desired. The rod D is provided with a plurality of enlargements d, through which the screw-plugs D pass, which latter have screw-threaded engagement with the outer casing and are adapted to have contact at their inner ends with the coil.

The casing A is herein shown as provided with a plurality of apertures within which are located insulating-plugs E, which are pro vided on their inner ends with heads E ,which serve to separate the winding 0 from the inner lining A of the casing A and also center the core within the casing. Said plugs E may be made of glass or other insulating material. The upper wall or lid of the casing is provided with a plurality of openings at, which serve to transmit the heat from the interior of the core in a well -known manner. The lower end of said core is provided with an opening A which acts in connection with said openings a in the upper wall or lid A to allow the passage of air through the heated interior of the core, thereby increasing the heating capacity of the apparatus as a whole Such construction also aids in directing the heat to where it can be utilized as a means for heating cooking utensils placed upon the top of the apparatus. Obviously the hollow interior of the core may be provided with one or a number of inner cores,which may be connected to the winding 0 in any preferred manner.

I claim as my invention 1. An electrical heating apparatus comp rising an outer casing, an inner tubular core of non-conducting material having a spiral groove upon its outersurface, a wire forming at one end a supply-wire and at its other end a return-wire and wound between its ends about the core in the said groove from one end of the said core to the other, the several turns of the said wire upon the core being insulated from each other, and the said outer casing being provided with a plurality of noneonducting inwardly extending projections interposed between the said outer casing and the winding on the said core. v

2. An electrical heating apparatus comprising an outereasing, an innereore, awire forming at one end a supply-wire and at its other end a return-wire and wound between its ends about the core from one end thereof to the other, the several turns of said wire upon the core being insulated from each other and a plurality of insulatingplugs mounted in said casing and provided on their inner ends with heads which are interposed between said outer casing and the winding upon the core.

In testimony that I claim the foregoing as my invention I aflix my signature, in presence of two witnesses, this 21st day of March, A. D. 1898.

JAMES D. S. REED. Witnesses:

WILLIAM L. HALL, W. A. WHITEHEAD. 

